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package com.sun.corba.se.impl.oa.poa;

import java.util.Enumeration;

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;
import org.omg.PortableServer.ServantManager;
import org.omg.PortableServer.ServantLocator;
import org.omg.PortableServer.ForwardRequest;
import org.omg.PortableServer.POAPackage.NoServant;
import org.omg.PortableServer.POAPackage.WrongPolicy;
import org.omg.PortableServer.POAPackage.ObjectNotActive;
import org.omg.PortableServer.POAPackage.ServantNotActive;
import org.omg.PortableServer.POAPackage.ObjectAlreadyActive;
import org.omg.PortableServer.POAPackage.ServantAlreadyActive;
import org.omg.PortableServer.ServantLocatorPackage.CookieHolder;

import com.sun.corba.se.impl.orbutil.concurrent.SyncUtil;
import com.sun.corba.se.impl.orbutil.ORBUtility;
import com.sun.corba.se.impl.orbutil.ORBConstants;

import com.sun.corba.se.spi.oa.OAInvocationInfo;
import com.sun.corba.se.impl.oa.NullServantImpl;

/** Implementation of POARequesHandler that provides policy specific
 * operations on the POA.
 */
public class POAPolicyMediatorImpl_NR_USM extends POAPolicyMediatorBase {
    private ServantLocator locator;

    POAPolicyMediatorImpl_NR_USM(Policies policies, POAImpl poa) {
        super(policies, poa);

        // assert !policies.retainServants() && policies.useServantManager()
        if (policies.retainServants())
            throw poa.invocationWrapper().policyMediatorBadPolicyInFactory();

        if (!policies.useServantManager())
            throw poa.invocationWrapper().policyMediatorBadPolicyInFactory();

        locator = null;
    }

    protected java.lang.Object internalGetServant(byte[] id, String operation) throws ForwardRequest {
        if (locator == null)
            throw poa.invocationWrapper().poaNoServantManager();

        CookieHolder cookieHolder = orb.peekInvocationInfo().getCookieHolder();

        // Try - finally is J2EE requirement.
        java.lang.Object servant;
        try {
            poa.unlock();

            servant = locator.preinvoke(id, poa, operation, cookieHolder);
            if (servant == null)
                servant = new NullServantImpl(poa.omgInvocationWrapper().nullServantReturned());
            else
                setDelegate((Servant) servant, id);
        } finally {
            poa.lock();
        }

        return servant;
    }

    public void returnServant() {
        OAInvocationInfo info = orb.peekInvocationInfo();
        if (locator == null)
            return;

        try {
            poa.unlock();
            locator.postinvoke(info.id(), (POA) (info.oa()), info.getOperation(), info.getCookieHolder().value, (Servant) (info.getServantContainer()));
        } finally {
            poa.lock();
        }
    }

    public void etherealizeAll() {
        // NO-OP
    }

    public void clearAOM() {
        // NO-OP
    }

    public ServantManager getServantManager() throws WrongPolicy {
        return locator;
    }

    public void setServantManager(ServantManager servantManager) throws WrongPolicy {
        if (locator != null)
            throw poa.invocationWrapper().servantManagerAlreadySet();

        if (servantManager instanceof ServantLocator)
            locator = (ServantLocator) servantManager;
        else
            throw poa.invocationWrapper().servantManagerBadType();
    }

    public Servant getDefaultServant() throws NoServant, WrongPolicy {
        throw new WrongPolicy();
    }

    public void setDefaultServant(Servant servant) throws WrongPolicy {
        throw new WrongPolicy();
    }

    public final void activateObject(byte[] id, Servant servant) throws WrongPolicy, ServantAlreadyActive, ObjectAlreadyActive {
        throw new WrongPolicy();
    }

    public Servant deactivateObject(byte[] id) throws ObjectNotActive, WrongPolicy {
        throw new WrongPolicy();
    }

    public byte[] servantToId(Servant servant) throws ServantNotActive, WrongPolicy {
        throw new WrongPolicy();
    }

    public Servant idToServant(byte[] id) throws WrongPolicy, ObjectNotActive {
        throw new WrongPolicy();
    }
}
